/*
   Copyright (c) 2011 Mizar Tools Contributors (mizartools.org)

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
/*  Contributors :
 *	2011-02-05 Marco Riccardi - initial implementation
 *  2011-03-25 Marco Riccardi - implementation of visitor pattern
 *
 */
package org.mizartools.system.xml;

import java.util.LinkedList;

import org.mizartools.system.ElementParseException;
import org.mizartools.system.INode;
import org.mizartools.utility.xml.XMLElement;

public abstract class SchemeDecl implements INode {

    private enum MySubclass { SchemeFuncDecl, SchemePredDecl,}

    public static boolean isSchemeDecl(String className){
        boolean found = false;
        for (MySubclass mySubclass :MySubclass.values()){
            if (mySubclass.name().equals(className)){
                found = true;
                break;
            }
        }
        return found;
    }

    public static SchemeDecl newInstance(INode parentNode, LinkedList<XMLElement> xmlElementList) throws ElementParseException {
        XMLElement xmlElement = xmlElementList.peek();
        MySubclass mySubclass = MySubclass.valueOf(xmlElement.getName());
        switch (mySubclass) {
        case SchemeFuncDecl: return SchemeFuncDecl.newInstance(parentNode, xmlElementList);
        case SchemePredDecl: return SchemePredDecl.newInstance(parentNode, xmlElementList);
        default: throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "XMLElement is a " + xmlElement.getName() + " not an element of SkeletonItem", xmlElementList);
        }
    }

    public LinkedList<XMLElement> getXMLElementList() {
    	if (this instanceof SchemeFuncDecl){
    		return ((SchemeFuncDecl) this).getXMLElementList();
    	}
    	if (this instanceof SchemePredDecl){
    		return ((SchemePredDecl) this).getXMLElementList();
    	}
    	return new LinkedList<XMLElement>(); 
    }

}
